| 摘要 |
PURPOSE:To obtain the titled compound which is a raw material for herbicides, etc. in one step in a short time, by reacting a pyridine compound with chlorine and anhydrous hydrogen fluoride in the vapor phase in the presence of a catalyst containing copper fluoride and a diluent such as carbon tetrachloride, N2 or helium. CONSTITUTION:A trifluoromethylpyridine is directly obtained from alpha-picoline, gamma-picoline or lutidine. In the process, a pyridin compound is reacted with chlorine and anhydrous hydrogen fluoride in the vapor phase in the presence of a copper fluoride catalyst consisting of cuprous fluoride, cupric fluoride, or a mixture thereof and an organic solvent, e.g. a halogenated hydrocarbon such as carbon tetrachloride or chloroform, or an inert gas such as nitrogen, helium or argon, as a diluent (for inhibiting the combustion, carbonization or formation of tarry by-products). USE:A raw material for insecides, etc. |
